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/**************************************************************************
*
* Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/*
* Thanks to krh and jcristau for the tips on
* going from fd to pci id via fstat and udev.
*/
#include <errno.h>
#include <stdio.h>
#include <xf86drm.h>
#include <sys/stat.h>
#include "internal.h"
#define LIBUDEV_I_KNOW_THE_API_IS_SUBJECT_TO_CHANGE
#include <libudev.h>
int linux_get_pciid_from_fd(int fd, unsigned *vendor_id, unsigned *chip_id)
{
struct udev *udev;
struct udev_device *device;
struct udev_device *parent;
const char *pci_id;
struct stat buffer;
int ret;
ret = fstat(fd, &buffer);
if (ret)
return -EINVAL;
if (!S_ISCHR(buffer.st_mode))
return -EINVAL;
udev = udev_new();
if (!udev)
return -ENOMEM;
device = udev_device_new_from_devnum(udev, 'c', buffer.st_rdev);
if (!device)
goto err_free_udev;
parent = udev_device_get_parent(device);
if (!parent)
goto err_free_device;
pci_id = udev_device_get_property_value(parent, "PCI_ID");
if (!pci_id)
goto err_free_device;
if (sscanf(pci_id, "%x:%x", vendor_id, chip_id) != 2)
goto err_free_device;
udev_device_unref(device);
udev_unref(udev);
return 0;
err_free_device:
udev_device_unref(device);
err_free_udev:
udev_unref(udev);
return -EINVAL;
}
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